The M240, officially the Machine Gun, 7.62 mm, M240 or unofficially the M240 Bravo, is the U.S. military designation for the FN MAG[5] (Mitrailleuse A Gaz, "gas-operated machine gun"; alternatively, Mitrailleuse d'Appui General, "general support machine gun"), a family of belt-fed, gas-operated medium machine guns that chamber the 7.62×51mm NATO cartridge.[1]
All variants are fed from disintegrating belts and are capable of firing most types of 7.62 mm (.30/.308 cal) NATO ammunition. M240 variants can be converted to use non-disintegrating belts. There are significant differences in weight and some features among some versions which restrict interchangeability of parts.